An admiral reaches retiring age and decides he wants to celebrate his time in the navy in a traditional way. So he decides that the one thing he always did when coming back to port was go visit the ladies of the night (Prostitutes).

He heads down the red light area and finds a young lady willing to take his business. He enquires as to the cost and agrees with the £40 charge.

Later in the hotel room he asks her "IN nautical terms, who would you say i was getting on?"

"About 3 knots" she replies.

"Only three knots" he stammers, "How do you work that out?" he demands.

Ready for this........

Your not hard, Your not in and your not getting your money back....lol